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Nature's Refuge Development Phase I Archaeological Survey and Architectural History Assessment Page 10 The water table was encountered in twelve of the shovel tests at an average depth of 56 cmbs. No archaeological materials were encountered in Area A. Area B encompassed three transects placed at 15 m (50 ft.) intervals. Nine shovel tests were excavated in this 0.3 -acre (0.1 hectare) area. The shovel tests were excavated to an average depth of 97 cmbs, and showed uniformity in soil composition. The A horizon was a dark yellowish brown to a dark grayish brown (10YR 3/6 — 10YR 4/2) sandy loam, which overlaid the B horizon of a yellowish brown to light yellowish brown (10YR 5/4 — 10YR 6/4) sand. The C horizon was not encountered in any of the shovel tests in Area B due to the high water table. The water table was encountered in two of the shovel tests at an average depth of 85 cmbs. No archaeological materials were encountered in Area B. Area C encompassed three transects placed at 15 m (50 ft.) intervals. Six shovel tests were excavated in this .2 -acre (.1 hectare) area. The shovel tests were excavated to an average depth of 87 cmbs, and showed uniformity in soil composition. The A horizon was a brown to dark yellowish brown (10YR 4/3 — 10YR 4/4) sandy loam, which overlaid the B horizon of light brownish gray (10YR 6/2) sand mottled with a dark yellowish brown (10YR 4/4) sand. The C horizon was encountered in two of the shovel tests and had a general matrix of a light brownish gray (10YR 6/2) sand mottled with a brown (7.5YR 4/4) sand and a light gray (10YR 7/2) sand. The water table was encountered in five of the shovel tests at an average depth of 79 cmbs. No archaeological materials were encountered in Area C. 4.2 ARCHITECTURAL HISTORY The 106 Group identified four properties within the project area that are 45 years in age or older (Figure 3; Table 2). All of the properties in the project area are residential, comprised of single - family houses. One house (Field No. 1) was constructed in 1900 according to the Anoka County tax assessor web site. Historical plat maps dating to 1914 (Webb) illustrate a structure near that location on the 160 -acre parcel owned by Rich Gibbs. Although this house may be associated with that farm, it has since been significantly altered by the application of vinyl siding, replacement and re- sizing of windows, and the removal of all original architectural details. The three remaining houses were constructed in the 1960s and exemplify both the architectural styles of tract housing and the pattern of exurban settlement during that period. All of the properties located within the project area have low potential to be eligible for listing on the NRHP. Photographs of the properties are located in Appendix A.